POLYMERIC COMPOSITIONS AND FILMS

Multiple layer films, and novel polymer compositions are disclosed for use in packaging sterile medical products and shelf stable foods. The films include at least two layers (12, 14) of modified polypropylene-based compositions, and optionally a third layer of polypropylene-based composition. The t...

Full description

Saved in:
Bibliographic Details
Main Authors RUSSELL EUGENE JOHNSON JR, RUSSELL PAUL GEHRKE, YONG JOO KIM
Format Patent
LanguageEnglish
Published 09.04.1992
Edition5
Subjects
ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS
CONVEYING
HANDLING THIN OR FILAMENTARY MATERIAL
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PACKAGES
PACKAGING ELEMENTS
PACKING
PERFORMING OPERATIONS
STORING
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
Online AccessGet full text

Cover

More Information
Summary:Multiple layer films, and novel polymer compositions are disclosed for use in packaging sterile medical products and shelf stable foods. The films include at least two layers (12, 14) of modified polypropylene-based compositions, and optionally a third layer of polypropylene-based composition. The two layers (12, 14) of the film comprise polypropylene polymers having melting point temperatures, differing by at least 3 DEG C, with corresponding ethylene contents disparate by at least 1 weight percent ethylene. In 2-layer films, the compositions include ethylene butene-1 copolymer in both layers, and optionally an elastomer in either or both layers. Three and four layer films are also disclosed wherein outer polypropylene based layers protect the inner layers, as of the two layer composition, from bonding to corresponding portions of adjacent like layers. The films can be fabricated into packages formed as by heat sealing, a covered tray type package being shown in Fig. 6.
Bibliography:Application Number: AU19880019760